“My office is participating in a multi-state inquiry to investigate this matter,” said Masto. “It is troubling to learn how many people have had their personal data stolen. This is simply not acceptable. Consumers should continue to stay informed and monitor their credit or debit card activity to protect themselves.”

During the holiday season, Target announced a data breach impacting approximately 40 million consumers who shopped at their U.S. retail stores and used a credit card or debit card between November 27 and December 15, 2013.

Compromised data included customer name, credit or debit card number, the card’s expiration date, CVV information (but not the three digit CVV2 codes on the back of cards), and encrypted PIN numbers.

However, Target recently confirmed that the names, mailing addresses, phone numbers and/or email addresses for up to 70 million of their customers were also compromised.

Target is partnering with Experian to offer one year of free credit monitoring for all guests who shopped our U.S. stores.